Savings Calculator
A savings calculator helps you estimate how your money may grow over time by using starting balance, recurring contributions, interest rate, and compounding assumptions.
Quick answer
Savings growth depends on contribution consistency, time horizon, and rate assumptions.
What this tells you
- •Savings growth depends on contribution consistency, time horizon, and rate assumptions.
- •Compounding frequency changes projected interest earned.
- •Outputs are estimates, not guaranteed account returns.
How to Use
- 1Enter your starting savings balance.
- 2Enter monthly contribution amount.
- 3Set annual interest rate and years.
- 4Choose compounding frequency and calculate.
How It Works
Formula
Each period: balance(next) = balance(current) + interest + contribution
interest = balance(current) x periodic rateThe calculator runs period-by-period growth using a fixed rate and fixed recurring contribution assumption.
Calculation note: values are processed in the order shown above, using the current input units.
Worked Examples
Savings growth estimate
Longer time horizons and regular contributions generally increase projected balance.
Common mistakes
- Assuming rate stays fixed for the full period
- Ignoring taxes on interest where applicable
- Forgetting to adjust contributions over time
Limitations
This model assumes constant rate, fixed contributions, and fixed compounding schedule. It does not include taxes, account fees, inflation, or changing contribution patterns.